Change JQuery URL to supported version on CTAT CDN

Examples/FractionAddition.html

@@ -3,7 +3,7 @@
   <meta http-equiv="cache-control" content="no-cache">
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   <link rel="stylesheet" href="https://cdn.ctat.cs.cmu.edu/releases/latest/CTAT.min.css"/>
-  <script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
+  <script src="https://cdn.ctat.cs.cmu.edu/releases/latest/jquery.min.js"></script>
   <script src="https://cdn.ctat.cs.cmu.edu/releases/latest/ctat.min.js"></script>
   <script src="https://cdn.ctat.cs.cmu.edu/releases/latest/ctatloader.js"></script>
   <script>